Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Patent
1989-07-24
1990-12-18
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
2432, 340760, 330 43, 350353, 351 44, G02C 710, G02F 1015
Patent
active
049782088
ABSTRACT:
A spatial light modulator includes a photosensor diode and a photoemitting diode array, each having two semiconductive layers of opposite electrical polarities, and which are sandwiched together with layers of the same polarity (P or N) in electrical contact with each other. Transparent electrode layers are formed on the opposite surfaces of the photosensor diode and photoemitting diode array respectively, in electrical contact with the layers of the opposite polarity. The individual photoemitting diodes are electrically and optically isolated from each other. With a voltage applied across the electrodes which causes the photosensor diode to be reverse biased and the photoemitting diodes to be forward biased, the photoemitting diode array generates a visual display which is a reproduction of a light image incident on the photosensor diode. The photosensor diode may be replaced by a single layer of a photoconductive material. Two of the spatial light modulators may be combined in a frame with suitable optics to provide eye protection goggles.
REFERENCES:
patent: 4848890 (1989-07-01), Horn
patent: 4914296 (1990-04-01), Reinhold et al.
W. P. Bleha, "Progress in Liquid Crystal Light Valves", Laser Focus/Electro-Optics, Oct. 1983, pp. 110-120.
Hsu Tsung-Yuan
Loo Robert Y.
Wu Shin-Tson
Bovernick Rodney B.
Coble P. M.
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
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